Cannot Start Multiple Tasks on One cDAQ Chassis

[diarmaede]

I am running multiple modules in a NI cDAQ-9172 chassis.  Module 1 is an NI 9213 TC module.  Module 2 is a 9211 TC module.  I can create and start a task on Mod1, and I can create a task on Mod2.  However, when I try to start the task on Mod2, I get error -200022, "Resource requested by this task has already been reserved by a different task."  I've never had this problem before.  I hope I am missing something obvious.  If anyone can help, I would appreciate it greatly.

[dkfire]

As far as I know, you can only have 1 Analog input task on a cDAQ.

You can combind the reading from both modules in the same task.

And just a comment on your code:

You need to learn to stay away from local variables and Stacked Sequence Structures.

If you think you need that SSS, then you are way better off with implementing a state machine.

[Dennis_Knutson · Accepted solution]

For the older 9172 - http://digital.ni.com/public.nsf/allkb/F18193C0F115B12586257C62006615DA?OpenDocument

[JarleEkanger]

I often run more than one analog input task on cDAQ-9184/88's, but i also encountered the same problem when assisting a student using a legacy chassis. However, there is still a limit on just one task on a single c-module.

[diarmaede]

I forced the boss to bite the bullet and ordered a new chassis.

[Dennis_Knutson]

Why do you need two different tasks? Your use of locals and the stacked sequence structure show a lack of understanding LabVIEW. You may have serious misconceptions about DAQ as well.

[diarmaede]

Nasty and condescending as always, Dennis.  Why do you have to be like that?  Why not offer solutions rather than insults?  Sorry if much of my LabVIEW coding is self-taught, but I have written some VIs that do amazing things.  If you have anything helpful to offer in terms of how I can read from multiple AI modules at various different sampling rates, please feel free to post them.  If you just want to hurl insults, I request you find someone else to vent on.

[Dennis_Knutson]

What is so condescending about pointing out what has already been said? Your code does show a lack of some basic understanding LabVIEEW nd your comments here do show a lack of understanding of some basic DAQ principles. If you would explain why you think you need different sample rates, I'll give you some actual suggestions.